1326726656631 has 24 divisors (see below), whose sum is σ = 1953043106976. Its totient is φ = 867572946240.

The previous prime is 1326726656621. The next prime is 1326726656683. The reversal of 1326726656631 is 1366566276231.

1326726656631 is a `hidden beast` number, since 1 + 3 + 2 + 6 + 72 + 6 + 6 + 566 + 3 + 1 = 666.

It is not a de Polignac number, because 1326726656631 - 2¹⁰ = 1326726655607 is a prime.

It is a super-2 number, since 2×1326726656631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326726656621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1509961 + ... + 2221133.

It is an arithmetic number, because the mean of its divisors is an integer number (81376796124).

Almost surely, 2^{1326726656631} is an apocalyptic number.

1326726656631 is a deficient number, since it is larger than the sum of its proper divisors (626316450345).

1326726656631 is a wasteful number, since it uses less digits than its factorization.

1326726656631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715143 (or 715140 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The spelling of 1326726656631 in words is "one trillion, three hundred twenty-six billion, seven hundred twenty-six million, six hundred fifty-six thousand, six hundred thirty-one".